查询词典 vegetation

The ecological water requirement of Robinia perseudoacacia can be expressed by the evapotranspiration of trees in growing season. It can be influenced by weather, vegetation, and soil moisture.

刺槐林的生态需水量可以理解为该林地的蒸散耗水量，受大气环境、植被生长状况与生长特性、土壤水分条件的综合影响。

Degradation strongly influences the presence of tolerative species in the seed bank and the vegetation, but it were less role to ruderal species.

我们认为：1土壤种子库拥有大量早期演替阶段的物种；2条件耐受性物种通常缺乏种子库；3退化强烈的影响了条件耐受性物种，而对杂草性物种的影响不大；4土壤种子库对青藏高原高寒草甸的恢复具有重要的贡献。

Studies of PFTs is benefit to expatiate relation of vegetation and disturbance and to analyse losing of biodisversity and invasion of ruderal in arid region.

植物功能型可用于分析生态系统功能、评价生态系统对环境变化的敏感性。

Salt marsh vegetation is one of the most important components of coastal wetlands, and its evolution and dynamics have direct influences on the ecosystem service and value of wetlands.

盐沼植被是滩涂湿地的重要组成部分，其动态变化直接影响着湿地的生态服务功能和价值。

In this paper, as a case of Karamay, we have studied on space-time changement of soil quality in oasis of arid area. We measured quality for different land use types and years in same type by combinativing field sampling for Karamay in Xinjiang and analysis in laboratory, which is directed by former theory of soil quality. Then we did integrated evaluation of soil quality for different land use types, and had drew some conclusions as followed: In four land use types, the soil bulk density of layers(0～15cm) for farmland and tree land is bigger than the other land use types.The organic matter of every layer in manpower Tamarix Bulrush land is bigger; organic matter of Tamarix Bulrush land release efficiency nitrogen which result ration of C/N is higher; total nitrogen of all layers in farmland variety great as being effected by mass use of nitrogen in agriculture; deadwood and defoliation of tree、shrub and bulrush pooled in 5cm layer to result that quick nitrogen is the biggest among all layers. The total salt of nature shrub tree land for every layer being bigger than farmland explain that nature shrub thee land strongly stand salt and farmland for basification in this area; that the nutrient of face layer is bigger than the ground layer may be explained by that vegetation gather nutrient to be stored in deadwood and defoliation.

本文对以克拉玛依为例，对干旱区绿洲土壤质量的时间空间变化进行研究，在有关土壤质量的研究理论指导下，通过田间调查取样和室内分析相结合的方法，对新疆克拉玛依市农业开发区的不同土地利用方式及同一土地利用方式下不同利用年限土样土壤理化性质进行测定，从而对新垦绿洲不同土地利用类型土壤质量进行综合评价，结果如下：四种土地利用方式中，农地、乔木林地表层(0-15cm)土壤容重较大；各土层人工柽柳芦苇地的土壤有机质含量均较大；柽柳芦苇地的有机质在矿化过程中所释放出有效氮，导致柽柳芦苇地的C/N比例较高；受到农业耕作使用大量氮肥的影响，农地各土层全氮含量变异较明显；乔木、灌木及芦苇的枯枝落叶主要集中在5cm范围之内，导致几种土地利用方式类型下该层土壤速效氮最大；天然灌木林地的土壤总盐在各层均较大，其次是农地，说明天然灌木林地的高耐盐能力，以及该区农业生产用地的土壤盐碱化程度较重。

The results show that: comparing the contrast community(formed by enclosure management for restoring vegetation naturaly on sand-dune for 7 years),some positive aspects of the artificial communities were showed as follows: 1 The level of the species diversity was more higher;2the vertical structure was so complicated that the surface of sand-dune was covered by multiple layers of plants;3 t...

结果表明：1利用植物再生沙障治理流动沙丘可以形成具有多物种、多层片、多层次垂直结构的沙障群落，其水平结构呈网格状沙障结构与障间小群落在空间上镶嵌互补，均衡分布的格局，具有很好的防风固沙和植被恢复效果；2再生沙障建植后第5年开始，沙障群落进入了衰退时期，适时采取科学的经营管理措施对于维持沙障群落的稳定，保障其效益的长期发挥是非常重要的。

The misuse and destruction to the land, as well as the excessive feed aggravated the pressure to the grassland, resulted in severe degraded vegetation, accelerated the transformation from grassland to plowland, sandlot and unused-land, destructively impacted on the vulnerable ecology of the study-area.

人为对草地的滥用和破坏，以及过度放牧加重了对草地压力，使得植被严重退化，加速了向耕地、沙地和未利用地的转化，给当地脆弱的生态环境造成破坏性影响。

Based on the summary of the existed researches, this paper puts forward a new method for stability analysis of sandy soil slope covered with vegetation.

在总结前人研究成果的基础上，提出了一套新的适用于有植被覆盖的沙质土壤边坡的稳定分析方法和步骤。

Precipitation and vegetation type were the main factors affecting the sawfly diversity.

相关分析表明，降水量和植被种类是影响叶蜂多样性的主要因素。

However, a number of vegetation indices are not linearly related to biochemical components, so these indices may not be appropriate for other vegetative areas. We selected two different scale parameters, leaf chlorophyll content and leaf area index, on the basis of the radiative transfer models PROSPECT and SAIL, respectively, for sensitivity study of a set of indices.

为了寻找合适的波段位置以改善植被指数与叶绿素浓度和叶面积指数的线性关系，去除饱和区域，进而提高这2个参数的实际估算精度，该文选取了叶绿素浓度和叶面积指数，以辐射传输模型PROSPECT和SAIL为基础，模拟了这2个参数变化对3类高光谱植被指数归一化植被指数(NDVI、优化的简单比值指数和优化的叶绿素吸收率指数的影响。

And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时，论述了一体化管理体系构建中的几个主要问题，包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。